ABB AC500 PLC - Page 169

XC = eXtreme Conditions
Extreme conditions
Terminal units for use in extreme ambient conditions have no sign for
XC version.
The figure 4 in the Part No. 1SAP4... (label) identifies the XC version.
Screw terminals Spring terminals
Conductor
1.5
1.6
1.7
1.8
1.9
Screwdriver Conductor
1.5
1.6
1.7
1.8
1.9
Screwdriver
(opens ter-
minal)
For information about wiring specifications see Ä Chapter 2.6.4.3 “Terminals at
the Terminal Unit” on page 1274.
For a detailed description of the mounting, disassembly and electrical connec-
tion of the terminal units and the I/O modules, please refer to the "System
Assembly, Construction and Connection" chapter Ä Chapter 2.6.3 “Mounting
and Demounting” on page 1261.
The terminals 1.8 to 4.8 and 1.9 to 4.9 are electrically interconnected within the terminal unit
and always have the same assignment, irrespective of the inserted module:
● Terminals 1.8 to 4.8: process voltage UP = +24 VDC
● Terminals 1.9 to 4.9: process voltage ZP = 0 V
The assignment of the other terminals depends on the inserted CS31 bus module.
The supply voltage of 24 VDC for the module's circuitry comes from ZP and UP.
XC Version
Terminals
Device Specifications
Terminal Units (AC500 Standard) > TU551-CS31 and TU552-CS31 for CS31 Communication Interface Modules
2019/04/17 3ADR010121, 13, en_US 169